drone: Adjust XZ parallelism and use yoe-debug-image
drone: Adjust XZ parallelism and use yoe-debug-image

Also build commercial packages for test if needed
limit load average to 1.0 at all times, so multiple CI jobs can run

Signed-off-by: Khem Raj <729d64b6f67515e258459a5f6d20ec88b2caf8df@gmail.com>

kraj/meta-clang,kraj/meta-clang,kraj/meta-clang